1571913387 has 12 divisors (see below), whose sum is σ = 2476954584. Its totient is φ = 952674720.

The previous prime is 1571913337. The next prime is 1571913389. The reversal of 1571913387 is 7833191751.

It is not a de Polignac number, because 1571913387 - 2¹¹ = 1571911339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1571913389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7938858 + ... + 7939055.

It is an arithmetic number, because the mean of its divisors is an integer number (206412882).

Almost surely, 2^1571913387 is an apocalyptic number.

1571913387 is a deficient number, since it is larger than the sum of its proper divisors (905041197).

1571913387 is a wasteful number, since it uses less digits than its factorization.

1571913387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15877930 (or 15877927 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 1571913387 is about 39647.3629261771. The cubic root of 1571913387 is about 1162.7228414983.

The spelling of 1571913387 in words is "one billion, five hundred seventy-one million, nine hundred thirteen thousand, three hundred eighty-seven".